The addition of dibromodifluoromethane to (trimethylsilyl)acetylene and transformation of the products
作者:Feng-Ling Qing、Dong-Peng Wan
DOI:10.1016/s0040-4020(98)00895-3
日期:1998.11
Reaction of dibromodifluoromethane (1) with (trimethylsilyl)acetylene (2) initiated by ammonium persulfate/sodium formate () yield the addition-reduction product (3a), tribromide compound (3b) and the non-fluorinated compound (4) which could be separated by careful distillation. The reaction appears to be initiated by CO2•-. Indium mediated coupling of 3a with aldehydes gave the corresponding gem-difluorohomoallyl
由过硫酸铵/甲酸钠()引发的二溴二氟甲烷(1)与(三甲基甲硅烷基)乙炔(2)反应生成加成还原产物(3a),三溴化物(3b)和非氟化化合物(4),它们可以是通过仔细蒸馏分离。该反应似乎是由CO 2 •-引发的。铟介导的3a与醛的偶联以高收率得到了带有三甲基甲硅烷基基团8的相应的宝石-二氟均烯丙基醇。在铟存在下3b与醛反应,得到偶合还原产物宝石-二氟均烯丙基醇9。该反应的区域化学和双键构型的保留可以根据宝石-二氟烯丙基中间体的更具亲核性的α-碳来合理化。